Diagnostic Journey From Suspected Ovarian Mass to Rare Mesothelial Cyst

Mesothelial cysts are rare, benign formations originating from the mesothelial cells lining body cavities. These cysts are more prevalent in women of reproductive age but can also be found in men and children. We present the case of a 38-year-old woman with a large pelvic mass initially suspected to be ovarian in origin. Imaging studies revealed complex cystic structures, and surgical exploration was necessary for a definitive diagnosis. Pathological examination confirmed a benign mesothelial-lined cyst. Despite their rarity and benign nature, mesothelial cysts should be included in the differential diagnosis of pelvic cysts. Recognizing these lesions can help prevent misdiagnosis and ensure appropriate management and counseling. More research needs to be done, especially regarding any implication to fertility potential.